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Hello there, two days ago i bought the car of my dreams a red 320 coupe with m20 1983
I loved the car n i wish i bought it a long time ago, anyways my engine is almost dead so i dont know what to do!!! I bought the car to have fun with it like drifting, as a third car in my house
The question is, i want a bigger engine but which one?? If i put 2.8 do i have to change the gear box and a lot of things like the radiator??? I dont have much money now to change everything but in the same time rebuilding fixing my engine will cost the same as buying a new one
So what engine should i buy guys!!!! 2.3???2.5?? 2.8?? 3.5???
Any ideas???

My suggestion if your on a budget you can get a M20B25 for relatively cheap with the harness and ECU and transmission if you so chose. But if you want to save and get some real power in that get a 24v swap like a M5X/S5X.

The M20B25 is a relatively easy swap, and you get 140 hp not a massive amount but its better than a broken car.

Thanks guys for the reply, i fixed my engine and but a 2.3 crankshaft with pistons, i had 125 n now 150 i guess, i didnt cost me a lot but it took me a long time to collect the parts because they are rare, anyways im happy with what i did for now but next change ( which is not far away) im gonna put m50 for sure, a lot of parts and cheaper

The issues I have with a M30B35 swap is that you are replacing a prehistoric motor with another prehistoric unit and
performance parts were limited for these motors the last time I looked.
I turbocharged some of these and suffered getting parts. This was whilst living in so-called civilisation (Europe).
This motor is not much cheaper here than a more moden one with single Vanos. The latter having lower mileage.
Or am I blowing hot air

The issues I have with a M30B35 swap is that you are replacing a prehistoric motor with another prehistoric unit and
performance parts were limited for these motors the last time I looked.
I turbocharged some of these and suffered getting parts. This was whilst living in so-called civilisation (Europe).
This motor is not much cheaper here than a more moden one with single Vanos. The latter having lower mileage.
Or am I blowing hot air

Yeah its a motor of the same era.. But a easier swap. Compared to other swaps, this is the best bang for the buck. I've located everything I need for my motor to turbo it, found it all with two websites. The M30B35 with a Turner chip can put down 260hp and 245ft. lbs of torque not bad for a stock all motor setup. And if you wanna go further Miller makes a awesome maf conversion kit that'll yield even better results.

With a good tune, skimmed head and thinner head gasket with a slight port job, not sure why you wouldn't see close to 290hp.

there are people that love the M30 swap and others that hate it. yes, its a lot more power and a lot easier than an M50 swap, for both maintenence and doing the actual swap. but its also a lot heavier.

im more in the M50 camp, but i have seen some pretty quick M30 builds. i have a mate that has an M30E30 race car